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2632. Charts. Bonny River. Bonny and New Calabar rivers, Gulf of Guinea, Nigeria, Africa, west coast, from British surveys between 1881 and 1920, with additions to 1929; with inset, Port Harcourt, Bonny River, from surveys by Harbor Authority in 1928; chart 2295. Scale naut. m.=1.2 in., natural scale 1:60,000.